Nventor



(No Model.)

W. H. HANNAN GOAL STOKBR.

110.523,982. Patented Aug.7,`1894.

WITNESSES; INVENTOR A! .44 M .lf/m M #f-L "M E l r ATTORNEYS.

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UNITED STATES PATENT OFFICE.

WILLIAM H. HANNAN, OF SYRACUSE, NEW YORK, ASSIGNOR TO HARRIET E. HANNAN, OF SAME PLACE.

COAL-STOKER.

SPECIFICATION forming part of Letters Patent No. 523,982, dated August 7,1 894.

Application tiled June 29,1893. Serial No. 479,162- v(No model.) i

To all whom t may concern: Be it known that I, WILLIAM H. HANNAN, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvementsl in Coal Stokers, of which the following, taken in connection with the accompanying drawings,visa full, clear, and exact description. i I My invention relates to apparatus for stok- Ing boilers, in which the coal is shoveled into l a receiver adapted to be dumped inwardly to deposit the coal into the lire, without opening any door; and in which the fire is raked and leveled off through a small aperture in an inner door, which is substantially closed by the shutting of an outer door, said double door belng also provided with draft openings and passages, to admit air onto the top of the front ofthe lire.

My obj ect is to produce a tilting coal-Stoker mounted in a boiler front, into which the coal is shoveled, and in lwhich the coal is more or less coked, before it is dumped onto the fire by the tilting of the receiver, so that more or less of the smoke-producing gases are eliminated before it is ignited; in which the tilt- Ing of the receiver, at least substantially, closesl the opening in the boiler front, thereby preventing the indraft of a large quantity of cold air and the damages resultant therefrom, to the fire, the fines, the heads and the other parts of the boiler; in which the receiver when restored to its normal position afterA dumping tightly closes the opening in the boiler front; in which the boiler front is provided with a double door, the inner section of which hollow has its inner wall perforated, lts outer one solid, except that both are provided with a small opening through which a hoe can be inserted for manipulating the coal dumped onto the fire, the outer section of the door being also hollow, provided .with a stopper, which, normally, substantially closes said opening in said inner wall of said inner door, said outer door being provided in its inner wall with slotways and with means for varying the size thereof, an intake aperture being left between the top of the outer and the inner sections of the door; and in which the ash-pit door is provided with an ordinary damper to regulate the inliow of air into the My invention consists in the several novel features of construction and operation hereinafter described Yand which are specifically set forth in thefclaims hereunto annexed. It is constructed as follows, reference being had to the accompanying drawings, in Which- Figure 1, is a front elevation of a boiler front, and the combined coal-receiver and Stoker ready for being tilted, the main door being also closed. Fig. 2, is a like view of the same, showing the receiver tilted, and also showing the outer section of the main door opened, Fig. 3, is a vertical sectional elevation of part of the boiler, boilerffront, the tilting coal-receiver lled, ready to be tilted, the front door closed, grate, ash-pit and ash-pit door. Fig. 4, is an enlarged vertical sectional elevation of the front-door closed.

A, is a boiler front, and oi-- is a boiler of any construction. Said front isl provided with an opening, above the fire, and front door, in which the coal-receiver lB is mounted and adapted to be tilted, consisting of a metallic 4plate -bwhich constitutes the bottom thereof, having its front end upturned to create the front -bof said receiver. Itsinner end bears against vthe transverse wall or baffle plate -c-.v Its top is closed by the plate -dwhich is supported by the vertical plates-ewhich aresecured to the front and project inwardly to the wall -c-, and outwardly as far as the front of the plate -b-, and constituting the sides of said receiver, detached from the plate -b-. The tilting bottom ZJ-rests and rocks upon the boiler front, and when tilted, as shown by the dotted lines,` is supported by the lug -bupon the bottom. A bar .-his pivoted upon the tilting plate and when swung around under one of the side plates e-, locks the bottom and prevents any accidental tilting, as in Fig. 1, While when swung, as in Fig. 2, it serves as a handle whereby the tilting can be effected, by raising the front ofy the receiving and tilting-plate, and then by pulling down, said plate is restored to its normal position ready to receive another charge.

D, is the front door shown as consisting of an inner section mm-` and an outer one IOC the boiler front and the outer one upon the inner section. rlhe inner section is cast or made hollow, with the back -mperforated at intervals, and with the aperture -rthrough both the front and back. section is also east or made hollow, is provided, in the back, with the slotways -n, a slide -n and a lever -n connected thereto projecting through the front by which the slide is operated to open or close the slots; is further provided with a bracket -r'- carrying a head -0" which, when this section 1s shut, substantially closes the aperture -r and the front of this section at the top projects over the top of the inner section, leaving an opening -sthrough which the lntake air enters iirst the outer section, t-hen passes through the slotways, then flows into the chamber -sbetween the door sections, thence through the outer aperture -r-- into the inner section and is thence passed through the perforations into the combustion chamber -t-, and in its passage through the doei' 1s more or less retarded by its zigzag course,

and is more or less heated and rareiiedin the heating chambers, and particularly between the door sections and in the inner one, so that it enters the combustion chamber in the nest condition to combine with the products of combustion, and without doing any damage to the boiler shell, tlues, tbc., incident to the letting in of cold air.

As the tilting ofthe coal substantially closes its opening in the boiler front, substantially all indraft of cold air is there prevented.

As the coal is deposited adjacent to the front of the fire, vthe aperture r becomes and is used as a Stoke-hole, through which the coal is spread around, the tire stirred and all the manipulations are performed, by means of the tools ordinarily used, so that the door with the stolze-hole is an accessory to the tilting coal receiver.

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination with a boiler, a boiler front and a wall across the combustion cham- The outer ber below the boiler, of vertical plates secured in the front, anda tilting plate mounted between said vertical plates, in said boiler front and engaging inwardly with said Wall.

2. The combination with a boiler, and a boiler front, of a vertically tilting coal-Stoker having its bearing in said front and projecting into the combustion chamber, and a baille plate under said boiler, and across the combustion chamber, normally closing the inner end of said stoker.

3. The combination with a boiler, a boiler front, of a coal-stoker comprising a stationary top and stationary sides extending from the boiler front inwardly and connected to a battle plate across the top of the combustion chamber, and a tilting bottom mounted upon said boiler-front and extending inwardly to said battle-plate and outwardly beyond said front, and adapted to close the opening in said front both when being lled and when tilted.

4L. The combination with a boiler front, and a tilting coal-stolzer mounted in it, of a door in said front, composed ot' sections, the inner one provided with a Stoke-hole and the outer one with means to close said Stoke-hole.

5. The combination with a boiler-front and a tilting coal-Stoker, of a door in said front, composed of hollow sections, the inner one provided with a Stoke hole through its walls, the outer one With a plate to substantially close said Stoke-hole.

6. The combination with a boiler front and a tilting coal-Stoker mounted therein, of a door in said front, composed of hollow sections having connected air-chambers, the iuuer section having a stolze-hole through its walls, and the outer one with a plate to substantially close said Stoke-hole, and means to regulate the intake of air through said sections.

In witness whereof I have hereunto set my hand this 3d day ot' June, 1893.

WILLIAM H. I'IANNAN.

In presence ot'- O. W. SMITH, HOWARD P. DENIsoN. 

